I just upgraded to Ubuntu 17.10 (from 16.04 TLS). I've had problems with my track stick since I own this laptop (Toshiba Portège): the pointer moves all over the screen when it's not disabled. Previously I would fix this by disabling the device

xinput disable <device number>

However, the pointer stick doesn't show up in the list when I run xinput. Neither does my touchpad, by the way.